Serious question - what rules in 5e encourage bad player behaviour?
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I'm just not bothering with a company that's repeating the exact same mistakes as their predecessors, so it's basically anything but 5e for me nowadays.
This is silly. EVERY system can be exploited, and every group should expect eachother to act in good faith. The difference between systems is what parts are done for you and what parts you do yourself, and every group is going to want a different assortment of those pieces. You're just mad that some groups get what they want out of DnD. You are the problem person in this image.
I get annoyed when people say things like "big deal, just do xyz yourself, why are you complaining?" . Because making a clear and comprehensive game is WOTC's job they are being paid for with our money!
If the system has a flaw, it's their job to fix it, if they don't they're doing a bad job.
That being said, 5.5e has been pretty cleaned up in this aspect. I'm honestly shocked at how they both added new fun systems and codified a lot of vague mechanics.
I dislike 5th edition for a lot of reasons, but this is extremely oversimplified binary thinking.